Spirax-Sarco 42439 Standard Bucket For 1-1/4″ B4 Series, All Pressures Inverted Bucket Steam Trap
Spirax-Sarco standard bucket is attached to the valve mechanisim. The valve mechanism is the device that allows the condensate and air to drain from the trap. The mechanism is a lever and seat operation, it is held in place by screwing the seat into the outlet port within the trap. With the inverted bucket attached to this mechanism, the steam pressure within the bucket keeps the lever up in turn keeping the seat closed when steam is present. When the steam cools and turns to a liquid state (condensate), the trap fills with condensate causing the bucket to drop and this opens the seat to allow the condensate and air to drain.
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